power/reset/gpio-poweroff.yaml

1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/power/reset/gpio-poweroff.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: GPIO controlled power off
10   - Sebastian Reichel <sre@kernel.org>
13   System power off support via a GPIO line. When a shutdown is
14   executed the operating system is expected to switch the GPIO
15   from inactive to active. After a delay (active-delay-ms) it
17   delay (inactive-delay-ms) it is configured as active again.
19   the system is still running after waiting some time (timeout-ms).
23     const: gpio-poweroff
31       Initially configure the GPIO line as an input. Only reconfigure
32       it to an output when the power-off sequence is initiated. If this optional
33       property is not specified, the GPIO is initialized as an output in its inactive state.
35   active-delay-ms:
37     description: Delay to wait after driving gpio active
39   inactive-delay-ms:
41     description: Delay to wait after driving gpio inactive
43   timeout-ms:
48   - compatible
49   - gpios
54   - |
55     gpio-poweroff {
56         compatible = "gpio-poweroff";
57         gpios = <&gpio 4 0>;
58         timeout-ms = <3000>;